Flora of North America species comparison

1–few, few–many branched distally.

1–few, erect or ascending, openly branched distally, villous to scabrous with septate hairs and loosely tomentose, ± glabrate.

basal and proximal cauline petiolate or tapering to base, usually absent at anthesis, blades oblong to oblanceolate, 2–15 cm, margins entire to dentate or pinnately lobed;

cauline long-decurrent, blades linear to oblong or oblanceolate, 1–5 cm, entire or dentate.

basal and proximal cauline petiolate, blades oblanceolate or elliptic, 5–25 cm, margins entire or shallowly dentate to irregularly pinnately lobed;

distal cauline sessile, not decurrent, blades linear to lanceolate, gradually smaller, entire or dentate.

ovoid, 10–15 mm, loosely cobwebby-tomentose or becoming glabrous.

ovoid to campanulate or hemispheric, 15–18 mm, usually ± as wide as high.

many;

corollas yellow, those of sterile florets 10–12 mm, slender, inconspicuous, those of fertile florets 10–12 mm.

40–100+, all fertile or the peripheral sterile;

corollas purple (rarely white), those of sterile florets ± expanded and exceeding corollas of fertile florets, those of fertile florets 15–18 mm.

appendages entire, acute or spine-tipped.

tips truncate, irregularly dentate or lobed.

disciform, 1–few at branch tips, borne singly or in open leafy corymbiform arrays, sometimes clustered in distal axils, sessile or pedunculate.

usually radiant (rarely discoid), in few-headed corymbiform arrays, borne on leafy-bracted peduncles.

dull white or light brown, ca. 2.5 mm, finely hairy;

pappi of many white, unequal, stiff bristles 2.5–3 mm.

tan, 2.5–3 mm, finely hairy;

pappi 0 or of many unequal, sometimes caducous bristles 0.5–1 mm.

phyllaries: bodies ± stramineous, ovate, appendages purplish, spiny-fringed at base, each tipped by slender spine 5–10 mm.

phyllaries: bodies lanceolate to ovate, loosely tomentose or glabrous, usually concealed by expanded appendages, appendages erect, overlapping, light to dark brown, flat or ± concave, margins varying from coarsely dentate to pectinately dissected into ± wiry lobes.

= 24.

= 22 (England), 44.